[PATCH -next] hwmon: (nzxt-smart2) Fix build with CONFIG_PM=n

[YueHaibing <yuehaibing@huawei.com>]

drivers/hwmon/nzxt-smart2.c:707:12: error: 'nzxt_smart2_hid_reset_resume' defined but not used [-Werror=unused-function]
  707 | static int nzxt_smart2_hid_reset_resume(struct hid_device *hdev)
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Move it into #ifdef block to fix this.

Fixes: 0e43f31ee52f ("hwmon: add driver for NZXT RGB&Fan Controller/Smart Device v2.")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/hwmon/nzxt-smart2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hwmon/nzxt-smart2.c b/drivers/hwmon/nzxt-smart2.c
index 534d39b8908e..4963d630394a 100644
--- a/drivers/hwmon/nzxt-smart2.c
+++ b/drivers/hwmon/nzxt-smart2.c
@@ -704,6 +704,7 @@ static int nzxt_smart2_hid_raw_event(struct hid_device *hdev,
 	return 0;
 }
 
+#ifdef CONFIG_PM
 static int nzxt_smart2_hid_reset_resume(struct hid_device *hdev)
 {
 	struct drvdata *drvdata = hid_get_drvdata(hdev);
@@ -720,6 +721,7 @@ static int nzxt_smart2_hid_reset_resume(struct hid_device *hdev)
 
 	return init_device(drvdata, drvdata->update_interval);
 }
+#endif
 
 static int nzxt_smart2_hid_probe(struct hid_device *hdev,
 				 const struct hid_device_id *id)
-- 
2.17.1